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Hello, I wanted to add a catch can due to the fact that I kept seeing milky oil when I open the fill cap. I look at the 2 nipples and there is no hose connected to any of them. I think the previous owner removed them.. but I don't know for what purpose. Also, I from what I've read on the forum, I should put the catch can on the nipple that is pointed downwards and block the other one? I've also attached some images.
I'd also like to add that I wasn't able to drive the car for some time do to a mechanical issue. I've just started it once in a while, so that may contribute to the milky oil
Milky oil at the fill cap is normal, especially with short trips and/or at low ambient temperatures. Water is a combustion product, and if stuff never gets very hot, condensation will collect in the filler area leading to the milky-looking oil. My car has been doing this since new in 1992.
One of those nipples is for venting of excess pressure in the oil pan to the intake manifold via the PCV valve (positive crankcase ventilation).
The one pointing down can be capped. it would typically be routed to a nipple on the turbo to facilitate crankcase ventilation but is mostly unneeded and commonly capped off.
Given the current state of the car w/o a PCV valve, either get that nipple routing to a catch can or get a PCV on there. You don't want to cap it since it does need to be able to vent crankcase pressure but you also don't want it open as junk can get in there and oil can leak out.
One of those nipples is for venting of excess pressure in the oil pan to the intake manifold via the PCV valve (positive crankcase ventilation).
The one pointing down can be capped. it would typically be routed to a nipple on the turbo to facilitate crankcase ventilation but is mostly unneeded and commonly capped off.
Given the current state of the car w/o a PCV valve, either get that nipple routing to a catch can or get a PCV on there. You don't want to cap it since it does need to be able to vent crankcase pressure but you also don't want it open as junk can get in there and oil can leak out.
Check the FAQ thread for catch can installation.
I see, thank you so much for your help. So, just for a quick recap, I should block the lower nipple, and use the one above for the catch can, correct?
Yes. I think that is how it is often done. Check the old threads for more. It has been a while since I've seen it so I could be missing something.
I have looked into it, but I have a issue: I don't have a vacuum source. I just have a filter DIRECTLY on my turbo with no piping. Will this impact anything?
